fabricated high-density polyethene (HDPE) fittings for potable water supplies, Part 3 Specific requirements for 90-degree bends

IS 8360 Part 3: Introduction and Adoption - Key Points

• Scope: Specifies requirements for fabricated HDPE fittings for potable water, specifically 90° bends welded to HDPE pipes per IS 4984-1972.
• Adoption Date: Adopted on 17 January 1977 by the Indian Standards Institution.
• Standard Mark Usage: Governed by Bureau of Indian Standards Act, 1986 (Clause 3.1.2).
• Rounding Off: Test results must be rounded per IS 2-1960, maintaining the same significant figures as specified values.

Key Table: Overall Laying Length (Z) of Fabricated 90° Bends (Clause 2.2.2)

Notes:

• Fabricated 90° bends dimensions ensure proper fit and welding compatibility.
• Part III focuses solely on 90° bends; general requirements are in Part I.
• The standard is protected under Indian Copyright Act; reproduction requires permission.

flowchart LR
    A[IS 8360 Part 3] --> B[Fabricated HDPE 90° Bends]
    B --> C[Overall Laying Length (Z) Table]
    B --> D[Welding

IS 8360 Part 3: Application and Scope for 90° Bends

• Scope: Specifies dimensions, marking, material, and testing requirements for fabricated 90° bends in plastic piping systems.
• General Requirements: Conform to IS 8360 Part 1 (Material, sizes, testing).
• Key Table: Overall Laying Length (Z) for 90° Bends

• Marking: As per Clause 3.1.2, use of Standard Mark governed by BIS Act 1986.
• Material & Testing: Per IS 8360 Part 1 -1977.

This ensures uniformity in fabrication and installation of bends for plastic piping systems.

flowchart LR
  A[IS 8360 Part 1] --> B[Material & Testing]
  B --> C[IS 8360 Part 3]
  C --> D[90° Bend Dimensions]
  D --> E[Overall Laying Length Table]
  C --> F[Marking as per BIS]

For detailed design or testing methods, refer to IS 8360 Part 1 and Part 3 full text.

IS 8360 Part 3: Overview of 90° Bends (Fabricated) Key Specifications

• Scope: Part 3 specifies requirements for fabricated 90° bends used in PVC piping systems, supplementing IS 8360 Part 1.

• General Requirements: Material, sizes, testing, and sampling follow IS 8360 Part 1 (Clause 2.1).

• Laying Length (Z):
  The overall laying length Z for 90° bends must comply with Table 1 and Fig. 1 (Clause 2.2.2).

• Tolerance: ± values indicate permissible manufacturing deviations.

Summary Diagram of 90° Bend Laying Length

flowchart LR
    A[Pipe Size (mm)] --> B[Laying Length Z (mm)]
    B --> C{Tolerance}
    C -->|Smaller sizes| D[±3 to ±5 mm]
    C -->|Medium sizes| E[±8 to ±10 mm]
    C -->|Larger sizes| F[±12 mm]

This ensures uniformity and compatibility in pipe assembly and installation.

IS 8360 Part 3: Scope & Key Specifications for 90° Bends

• Scope:
  Covers specific requirements for fabricated 90° bends in PVC pipes, supplementing IS 8360 Part 1 (material, sizes, tests).

• Overall Laying Length (Z):
  Defined as the total length of the 90° bend along the pipe axis, critical for installation and layout.

• Key Table: Overall Laying Length (Z) for 90° Bends

• Reference:
  • Clause 2.1: General requirements per IS 8360 Part 1 (1977)
  • Clause 2.2.2: Laying length and tolerances as above

This ensures compatibility and proper fitting during installation of 90° bends in PVC piping systems.

IS 8360 Part 3: General Requirements for 90° Bends

Key Specifications:

• Material, sizes, test methods, and sampling must conform to IS 8360 Part 1 (1977).
• Overall laying length (Z) of fabricated 90° bends is critical for installation and must follow prescribed dimensions and tolerances.

Table 1: Overall Laying Length (Z) for 90° Bends

Notes:

• The laying length Z is the total length of the bend along the pipe axis.
• Tolerances ensure proper fit and alignment during pipeline assembly.

flowchart LR
    A[IS 8360 Part 1] --> B[Material, Size, Test Methods]
    B --> C[IS 8360 Part 3]
    C --> D[90° Bends Fabrication]
    D --> E[Overall Laying Length (Z)]
    E --> F[Table 1 Dimensions & Tolerances]

This ensures standardized fabrication and installation of 90° bends for consistent pipeline performance.

IS 8360 Part 3: Manufacture of 90° Bends - Key Specifications

1. General Requirements (Clause 2.1)

• Materials, sizes, test methods, and sampling must comply with IS 8360 Part 1 (1977).

2. Fabrication Dimensions (Clause 2.2.2 & Table 1)

• The Overall Laying Length (Z) for fabricated 90° bends is specified by pipe size.
• This length controls the dimension from end to end of the bend for proper fitting.

3. Marking & Quality

• Marking should follow Clause 2.2.2 (details in IS 8360 Part 3).
• Ensure dimensional tolerances are strictly maintained for proper assembly.

Summary Diagram: 90° Bend Overall Length

flowchart LR
A[Pipe End] --> B[90° Bend] --> C[Pipe End]
B -- Overall Laying Length (Z) --> D[Dimension as per Table 1]

Use this table and dimension control for manufacturing compliance and installation accuracy.

IS 8360 Part 3: 90° Fabricated Bend Key Details

1. Illustration

• Fig. 1 shows a typical 90° fabricated bend (not included here).

2. Overall Laying Length (Z)

• The overall laying length is the straight-line length from end to end of the 90° bend.
• Given in Table 1 below (Clause 2.2.2):

3. Pipe Dimensions & Thickness

• Outer diameter and wall thickness must comply with IS 8360 Part 1 (1977).
• Wall thickness of the fabricated bend ≥ wall thickness of the pipe it connects to.

Summary:

• Use Table 1 for laying length Z.
• Ensure wall thickness consistency per IS 8360 Part 1.
• 90° bends are fabricated to maintain pipe dimensions and welding compatibility.

flowchart LR
    A[Pipe] --> B[90° Fabricated Bend]
    B --> C[Overall Laying Length Z]
    B --> D[Wall Thickness ≥ Pipe Wall Thickness]
    C -->|Refer Table 1| E[Dimension Z]

This ensures proper fit and structural integrity in piping systems.

IS 8360 Part 3: Laying Length and Tolerances for 90° Bends

Key Specification:

• Overall Laying Length (Z) for fabricated 90° bends must comply with Table 1 and Fig. 1 (not provided here).

Table 1: Overall Laying Length (Z) and Tolerances

Notes:

• The laying length Z is the overall length of the fabricated 90° bend.
• Tolerances increase with size; ensure compliance during fabrication.
• Refer to Fig. 1 in IS 8360 Part 3 for dimensional details and laying length measurement method.
• Material and testing conform to IS 8360 Part 1 (1977).

This table ensures dimensional accuracy and fitment in piping systems using fabricated bends.

IS 8360 Part 3 (1977) — Key Specifications for Pipe Diameter & Wall Thickness of 90° Bends

• Outside Diameter & Wall Thickness:
  Must comply with IS 8360 Part 1 (1977) for pipes used in fabricating 90° bends.
  Wall thickness of the bend ≥ Wall thickness of the pipe to which it is welded.

• Overall Laying Length (Z) for 90° Bends (Clause 2.2.2 & Table 1):

Additional Notes:

• For exact pipe wall thickness, refer IS 8360 Part 1 tables for HDPE pipes.
• Fabricated bends must maintain dimensional tolerances per the standard.
• Ensures compatibility and structural integrity when welded.

flowchart LR
    A[Pipe Diameter & Wall Thickness] --> B[IS 8360 Part 1 Compliance]
    B --> C[Wall Thickness Bend ≥ Pipe Wall Thickness]
    A --> D[Overall Laying Length (Z)]
    D --> E[Refer Table 1 for Sizes & Lengths]

This ensures safe, standardized fabrication of HDPE 90° bends for potable water systems.

IS 8360 Part 3: Marking Requirements for Fabricated 90° Bends

• Marking Clause (3.1.1):
  Each fabricated 90° bend may be marked with the Standard mark to ensure traceability and conformity.

• Dimensions Table (Clause 2.2.2, Table 1):
  The overall laying length (Z) for 90° bends is standardized as follows (in mm):

• General Requirements (Clause 2.1):
  Material, size, testing, and sampling conform to IS 8360 Part 1 - 1977.

Summary:

• Marking with the Standard mark is optional but recommended.
• Use the above table for fabrication length control.
• Follow IS 8360 Part 1 for material and testing compliance.

flowchart LR
    A[Fabricated 90° Bend] --> B{Marking}
    B -->|Yes| C[Standard Mark]
    B -->|No| D[No Mark]
    A --> E[Check Overall Laying Length Z]
    E --> F[Refer Table 1 per Size]
    A --> G[Material & Testing]
    G --> H

IS 8360 Part 3 — Standard Mark Usage for Fabricated 90° Bends

Key Specifications:

• Clause 3.1.1: Each fabricated 90° bend fitting may be marked with the Standard Mark.
• Clause 3.1.2: Use of the Standard Mark is governed by the Bureau of Indian Standards Act, 1986. Licensing details are available from BIS.

Important Table: Overall Laying Length (Z) of 90° Bends (Clause 2.2.2)

Notes:

• The Standard Mark confirms compliance with IS 8360 Part 3.
• Marking ensures traceability and quality assurance.
• For licensing and detailed marking regulations, contact the Bureau of Indian Standards regional offices.

Summary Diagram of Marking Flow:

flowchart TD
    A[Fabricated 90° Bend] --> B{Meets IS 8360 Part 3?}
    B -- Yes --> C[Apply Standard Mark]
    B -- No --> D[No Standard Mark]
    C --> E[Quality Assurance & Traceability]

This concise overview helps manufacturers and users ensure fittings meet IS standards with proper marking.

IS 8360 Part 3: Licence and Marking Regulations - Key Points

1. Marking Specifications (Clause 2.2.2 & 3.1.1)

• Fabricated 90° bends must have overall laying length (Z) as per Table below.
• Each fabricated 90° bend may bear the Standard Mark.

2. Licence for Use of Standard Mark (Clause 3.1.2)

• Governed by BIS Act, 1986 and related rules.
• Licence conditions and permission to use the Standard Mark are issued by the Bureau of Indian Standards.
• Manufacturers must comply with BIS regulations to apply and use the Standard Mark on products.

Summary Diagram: Licence & Marking Flow

flowchart TD
    A[Manufacturer] --> B[Apply for Licence]
    B --> C{BIS Approval}
    C -->|Approved| D[Use Standard Mark]
    C -->|Rejected| E[No Marking]
    D --> F[Mark 90° Bends as per IS 8360 Part 3]

**For detailed licence application and conditions, contact the nearest BIS Regional Office or Central